CVE-2026-49271
MEDIUM EPSS 9.9%
Published Jun 19, 20261w ago · Modified Jun 23, 20261w ago
6.5 CVSS 3.1
Published Jun 19, 2026 1w ago
Last Modified Jun 23, 2026 1w ago
Description
libheif is a HEIF and AVIF file format decoder and encoder. Prior to version 1.22.1, the uncompressed HEIF decoder validates explicit icef compressed-unit offsets using unit_offset + unit_size. Because the addition can wrap, a crafted HEIF file can pass the range check and then construct a vector from iterators outside the compressed item buffer, producing an out-of-bounds heap read and crash. Version 1.22.1 patches the issue.
CVSS Details
Base Score
Exploitability
Impact
Vector string
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H Attack Vector Network
Attack Complexity Low
Privileges Required None
User Interaction Required
Scope Unchanged
Confidentiality None
Integrity None
Availability High
Threat Intelligence
EPSS Exploit Probability
9.9% percentile
Exploit & Patch Status
No Known Exploit
No Patch Available
Weaknesses 1
CWE-125 Out-of-bounds Read Memory Safety
References 1
- github.com https://github.com/strukturag/libheif/security/advisories/GHSA-r7qj-cg5r-r6vf
Remediation
No remediation data recorded yet
Check vendor advisories and the NVD entry for patch availability.